（1 沈阳建筑大学土木工程学院， 沈阳 110168； 2 成都基准方中建筑设计有限公司， 成都 610021；3 中天建设集团， 湖州 313000）

［摘要］基于含纤维增强聚合物(FRP)约束环的钢筋搭接连接技术的钢筋锚固试验研究，共设计制作78组含FRP约束的钢筋搭接连接构件，主要进行钢筋搭接的静力拉伸试验研究。试验主要考虑钢筋搭接长度、钢筋直径、混凝土强度、FRP约束环内径与壁厚等参数的影响。试验结果表明：钢筋在2ll/3，ll/2，ll/3搭接长度情况下，搭接性能均能够得到保证；FRP约束环既能与内部灌浆料很好地粘结，又能与外围混凝土协同工作，同时也间接证明含FRP约束环的钢筋搭接连接技术是一种连接性能可靠、施工操作简便、经济效益突出，且适合于预制装配式混凝土结构钢筋连接技术。

［关键词］装配式混凝土结构； 纤维增强聚合物； 钢筋搭接； 静力拉伸试验； 微膨胀灌浆料； 环向约束

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2020)15-0074-06

Experimental study on lap connection of steel bar with FRP constraint ring

JIN Qiao1, LI Jinglong1, GAO Meng2, WEN Xuebin3, ZHAO Mingze1

（1 School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China；2 Chengdu Benchmark Building Design Co., Ltd.,  Chengdu 610021, China；3 Zhong Tian Construction Group, Huzhou 313000, China）

Abstract:On the basis of the experimental research on steel bar anchorage of the lap connection technology of steel bar with  fiber reinforced polymer(FRP)  constraint ring, a total of 78 groups of steel bar lap connection members with FRP restraint were designed and fabricated. The static tensile tests of steel bar lap connection were mainly carried out. The main parameters considered in the tests included the lapping length of steel bar, the diameter of steel bar, the strength of concrete, the inner diameter and the wall thickness of FRP restraint ring. The test results show that the lap performance of the steel bar can be guaranteed under the lap length of 2ll/3,ll/2 and ll/3; the FRP restraint ring can bond well with the internal grouting material, and can also cooperate with the surrounding concrete. At the same time, it is also proved indirectly that the lap connection technology of steel bar with FRP restrained ring has reliable connection, simple construction operation, outstanding economic benefits, and is suitable for the steel bar connection in the prefabricated concrete structure.

Keywords:prefabricated concrete structure; fiber reinforced polymer; reinforcement lap; static tensile test; micro expansion grouting material; circumferential constraint

*住建部项目（2017-K9-057），中国博士后科学基金第59批面上资助项目（2016M591456）。

作者简介：金峤，博士，副教授，硕士生导师，Email:goldenfss@163.com。